Math

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What is the sequence of conversion factors for units if you change from ft/sec. to km/hour?

Is it ft/sec x sec/min x min/hour x ft/m x km/m?

  • Math -

    No, you have an upside-down fraction

    ft/sec x sec/min = ft/min
    ft/min x min/hr = ft/hr
    ft/hr x m/ft = m/hr <<<----
    m/hr x km/m = km/hr

  • Math -

    1 in = 25.4 mm = 2.54 cm = 0.0254 m

    1ft = 12 in

    1ft = 12 * 0.0254

    1 ft = 0.3048 m


    1 km = 1000 m


    1 ft = 0.3048 / 1000 = 0.0003048 km


    1 h = 3600 s

    1 s = 1 / 3600 h


    1 ft / s= 0.0003048 / ( 1 / 3600 )

    1 ft / s= 0.0003048 * 3600


    1 ft / s = 1.09728 km / h

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